ca tinh , yeu bong da,thich co nhieu ban be
Joined on June 2017
FACTSlides is an endless stream of amazing facts presented as colorful and animated slides.
Catalogs yours books online. Free for up to 200 titles.
HowStuffWorks explains thousands of topics, from engines to lock-picking to ESP, with video and illustrations so you can learn how everything works.
Nate Silver’s FiveThirtyEight uses statistical analysis — hard numbers — to tell compelling stories about politics, sports, science, economics and culture.
TED is a nonprofit devoted to Ideas Worth Spreading - through TED.com, our annual conferences, the annual TED Prize and local TEDx events.
Post anything from anywhere! Customize everything, find and follow what you love. Create your own Tumblr blog today.
Add and share cool stuff with others.
Create and share interactive reports, presentations, personal stories, and more.